Washinoton



(No Model.) 6 Sheets-Sheet 1.

l J.SAGK. AUTOMATIC INDIVIDUAL TELEPHONE CALL APPARATUS. No. 492,110.

Patented Feb. 21, 1893. Y

9 t. e e h s S t e e h S 6 K C .S J. d. d o M 0 m AUTOMATIC INDIVIDUAL TELEPHONE GALL APPARATUS. No. 492,110.

Patented Feb. 21, 1893'.

mu; (QU/ "mr: Nonms Permis co. Fuero-uma. WASHINGTON. n, c.

(No Model.) 6 sheets-sheet 3;'

` -J.SA0K. AUTOMATIC INDIVIDUAL TELEPHONE GALL APPARATUS.

No. 492,110. Patented Peb, 21', 189s.

. AU O. QV 4G YH: Ncwms Pirzns co., PNoTcAlTHo.. wAsmNGTaN. D c

(No Model.)v GSheets-Sheet 4.

J. SACK. Y l AUTOMATIC INDIVIDUAL TELEPHONE CALL APPARATUS. N0. 492,110.

Patented P eb. 21, 1893.

(Ne Medel.) sA sheets-sheet 5,

J. SACK'. AUTOMATIC INDIVIDUAL TPLPPIIUNP GALL APPARATUS. f

Ne. 492,110.y Peteeted Peb. 21, 189s.

@1o Model.) 6 SheetsfSheet 6.

- J. SACK.

AUTOMATIC INDIVIDUAL TELEPHONE GALL APPARATUS.

No. 492,110. Patented Feb. Z1, 1893.

IINTTED ESTATES PATENT Teton.

.IOSEPH SACK, OF BERLIN, GERMANY.

AUTOMATIC INDIVIDUAL TELEPHONE-CALL APPARATUS.

SPECIFICATION forming part of Letters Patent No. 492,110, dated February 21, 1893.

Application tiled September 18, 1891. Serial No. 406,062. (No modeLl To a/ZZ whom it may concern.-

Be it known that I, JOSEPH SACK, a subject of the German Emperor, residing at Berlin, Germany, have invented certain new and useful Improvements in Automatic Individual Telephone-Call Apparatus, of which the following is a specification.

This invention relates to a telephone call apparatus by means of which the called up station may be readily connected with the transmitting station, while the other stations in the circuit are entirely disconnected, so that the latter cannot interrupt or intercept the conversation.

The invention consists in the various features of improvement more fully pointed out in the claims.

In the accompanying drawings: Figure 1 is a longitudinal section through the apparatus. Fig. 2 a plan Fig. 3 a cross section. Fig. 4 a longitudinal section with the parts in a dierent position. Fig. 5 an elevation of part of the apparatus. Fig. 6 a further elevation with the parts in a diierentposition. Fig. 7 an end view of spring m. Figs. 8 and 9 are still further elevations of the apparatus. Figs. 10, 11 and 12 are details of the toothed segment g and spring b. Figs. 13 to 16 are further details of the disk h and co-operating parts and Figs. 17, le, lsb, isc, 19e, 19h, 19C, 20a, 2o, and 21 show the circuits.

The letter a represents the key having wedge shaped plug a', which on depression of the key bears against armature cl, and the contact spring b, to push the latter away from pin c and against pin c (Fig. 1l). The current then passes (Fig. 19) from the battery over connection B, contact c spring b, contact pin o, spring m', lever m, connection L and thence through the other instruments in the circuit and back or to the earth. In those apparati within the circuit, in which spring b, remains in contact with pin c, the current runs over connection L', lever m, spring m', pin o, spring b, pin c', and thence through the electro-magnets d3, connected therewith, to connection L2, and to the earth or farther on through the conducting wires. The electro-magnets d3, at each station will become active and attract their armatures d. The armature d,1`s free to turn on pivots d2, and is normally drawn away 9, 10 and 11.)

The armature is provided with pin d', mov- I able within the toothed slotted segment g. This segment g, is moved by spring f, to the left for the distance of one tooth, during each motion of the armature. If at any one station, the key is depressed three times, to three times close the circuit, the armatures Will be attracted and released three times and the segments g, will be moved forward three teeth at each station.

Upon the shaft of the segment there is set a disk h, having contact pin h'. VThis pin, as will be described further below, comes into Contact with contact spring m3, during one particular position only of disk h. The pins h', are differently arranged upon the disks, at the different stations. Thus if the key is depressed once, the pin h', of say the first station, makes contact with spring m3, while by a double depression of the key, the pin h', of the second station makes contact with its spring &c (see Fig. 20).

The apparatus is provided with a clockwork which is immediately disconnected upon a motion of segment g, and disk h. The clockworks of all the stations within the circuit will be simultaneously set in motion, if at any one station contact is made, by a de pression of the key, because the magnets will attract the armatures of all the stations and thus the segments g, and disks h, will all be moved forward. At the transmitting station also the clockwork is disconnected, because by a pressure upon the key a, the plug a', is pressed against armature d, and thus the pin d', Iiberates the Segment g, for the distance of one or more teeth. The segment g, falls under the action of its spring and takes the disk h, with it. The clockwork isnow disconnected by the disk h. This disk is provided with a notch, which is engaged by a tooth 7c', of lever k (Figs. 1, 4, 6, 13 to 16). The lever turns on shaft k2, carrying lever arm los, having pawl 164. The pawl 104, is placed over the clock escapement, having stop 105, and permits such stop to turn in one, but not in the other direction. When the stop Z55,

rests against the pawl, the spring of the escapement remains under tension. Thus, aS

IOC)

soon as the lever Zt, is depressed and the lever arm 7a3, is raised, the escapement is at once set into action by its spring. This occurs on the turning of disk 7L, because the tooth Zt', will then be pressed out of its notch and the leverc, and arm k3, will be set in motion 15 and 16).

The clockwork will cause primarily a motion of the contact lever m. This takes effect because after a few seconds (during which the key has been depressed one or more times) the tooth Z2, of disk Z turning a shaft Z', will leave the nose n, of lever m, and the latter is by springp, moved toward the contact pin 0, (Figs. 1, 5, 6 and S).

At the stations that are not to be called up, the lever m will with spring m2, lie against pin o', whereby these apparati are all disconnected and a direct communication is established through the conducting wires that are attached to the connection L' and L2. The current will travel over connection L', lever m, spring m2, pin o', to connection L2, and to the conducting wires or the earth. At the transmitting and receiving stations however, the telephone or the call is brought into the circuit (Fig. 1S). At the transmitting station the depression of key ct, will cause simultaneously the depression of a lever q, placed beneath plug a'. The lever q, willbe held down by pawl q', against the action of a. spring q2. Then the tooth Z2, of disk Z, leaves the nose n, of lever m, the latter will with its projection 'm4, bear against lever q. Thus lever in, is held in a position, that it can neither go with spring m', to contact o, nor with spring m2, to Contact o (Fig. The current will therefore travel over lever m, lever q, connected with connection T, (Fig. 20) and over the telephone or call to the ground or back. At the receiving station the making of the contact will, as has been stated,cause the pin ZL', to come into such a position, that the spring m3, on lever m, will strike against the pin. Thus the lever on, is also put into a position, that it will, with springs m', m2, touch neither pin 0, nor pin o. As the disk h, is connected with connection T, the current can travel over lever m, spring m3, pin Zz', disk h, connection T, dac. to the receiving instrument or call. The contact between lever m, and lever q, or spring m3, and pin 7L', takes place only after a short motion of the clockwork. The current for the call station is now closed as follows: from thekey over connection T, lever q, projection m4, lever m, connection L', to the conducting wires and to the called station, thence over connection L', lever m, spring mi, nose Zt', disk ZL, connection T, to the instrument T', and thence to the call or through the instrument te connection L2, and thence back or to the earth. The segmentg, and disk h, are moved back by nose t', (Figs. 1, 13 to 16) after one revolution of disk t, mounted on shaft Z'. This nose moves backward the lever s, having nose s', and held by sprln g s2. Thus the lever o, is simultaneously moved in the same direction, in as much as it is connected with lever S, by arm 'v'. The lever r, carries at its upper end a pin e2, which strikes against nose g', of the segment and thus the latter is turned slowly out of the position shown in Fig. 15. The pin CZ', of the armature, does not oifer any resistance to this motion, because the teeth of the segment are inclined in that direction (Figs. 2, 10 and l1). After the segment has turned back, the clockwork is again simultaneously stopped. Together with the segment, the disk Zz, placed on the same shaft, comes back into its primary position, so that the tooth k', of lever Zt, can fall into the notch. This causes the lever 7c3, with its pawl Zr, to drop and stop the escapement. In order to prevent the clockwork from being stopped before the nose t', of disk t, can resume its primary position (Figs. 1, 4 and 13) and can pass the nose s', of lever s, an additional lever arm w, terminating in hook w', is secured to shaft k2. This hook engages the pin e2, of lever c, as soon as the latter is moved out of its normal position by nose 'Z' (Figs. Il, l5 and 1G) so that the lever w, is held and the lever arm k3, remains raised, even if the notch in disk 7L, would permit an engagement with the tooth Z3. As soon as the nose Z', leaves the lever and the latter is drawn back by spring s2, the lever t), will resume its normal position and the pin c2, will leave lever w', so that the lever arm 7c3, can fall down by gravity. Immediately before the segment g, or simultaneously therewith, the lever q, comes back into its normal position, because the nose a3, on shaft Z', (Figs. 4 to 6 and 8) will strike against nose it', of pawl q', before the disk has completed its rotation. The nose n3,\vill thus draw the pawl back from pin Q3, so that the spring q2, can push the lever q, back into its normal position.

If the call of the receiving station is not to be acted upon directly by the battery or the induction current, but by a local current, a special contact system having a local battery is used. This consists of spring u, with isolated nose u', and contact screw u2, (Figs. 1, 3, 4, 6 and 8.) The disk Z, carries a pin e', which presses the spring u, against contact disk a2, after the apparatus has run a short time. This closes the call circuit for about ten seconds. The local current now runs as follows (Fig. 18): from battery to connection W', spring u, contact screw u2, connection L', lever m, spring m3, nose Zz', disk h, connection T, to the call and back to battery.

The circuits are indicated in Figs. 17 to 2l. Upon the depression of the key, the current travels as follows (Fig. 20a): from the battery over connection B, contact c', spring Z), pin 0, spring m', lever Im, connection L', and thence through the following apparati and back through the ground. In those apparati within the circuit in which the spring ZJ, remains in contact with pin c, (Fig. 20") the current travels as follows: from connection L', lever in, spring m', pin o, spring Z, pin c, electromag- IOO IIO

net cl3, connection L2, and thence to the ground or to the continuation of the circuit.

At the transmitting apparatus, in which the key is depressed at the telephone or the inductor is revolved (Fig. 19a) the current travels as follows: over connection T, disk h, lever q, projection m4, lever m, connection L', through the wires to the receiving station and there over projection L', lever m, spring m3, nose h', disk h, connection T, to the telephone. The current passes either over the telephone lever to the alarm, or if the telephone is in use, through the telephone to connection L2 and thence back or to the ground.

At the stations which are not desired'to be connected (Fig. 19") the lever m, makes contact by spring m2, with pin o', This disconnects the several apparati and causes a direct connection ofthe wires secured to the connections L', and L2, because the current travels over connection L', lever m spring m2, contact pin o', to the connection L2, and to the continuation of the circuit or to the ground.

At the receiving station (Fig. 19C) in which the lever m, with its projection 'm3, makes contact with pin h', of disk h, the current travels as follows: over connection L', lever m, spring mpin h' disk h, connection T, and to the telephone or to the alarm.

The local current travels as follows: from the battery to connection W, spring u, contact u2, connection L', lever m, spring m3, nose h', disk. h, connection T, to the alarm or back to battery.

An indicator may be employed which shows when the clockwork of an apparatus has run down and which simultaneously cuts 0H the apparatus, so that the current can continue over the circuit, or with the lastkv apparatus, can return or go to the ground.

What I claim -isv i v 1. TheY combination of lever m, with the pins o, o', disks h, having nose h', and lever q, with which the lever m, is adapted to make contact, substantially as specified.

2. The combination of key c, having plug a', with lever q, adapted to be depressed by the plug, pawl q', adapted to engage the lever and with contact spring b, contacts c', c, and segment g, substantially as specified.

3. The combination of spring u, with screw pin u2, disk Z, having pin e', and nose Z2, and with lever m, spring m', and contact o, substantially as specified.

4. The combination of lever qwith shaft l' having nose n3, disk l having tooth Z2, lever m having nose n and projection m4 and with pawl q having nose n', substantially as specified.

5. The combination of segment g, having nose g', with shaft Z', disk t, having nose t', levers s, o, w, pin o2, notched disk h, lever k, having nose 7o', and pawl 704, and with an escapement adapted to be engaged by the pawl, substantially as specified. In testimony whereof I have signed this specification in the presen ce of two subscribing witnesses.

JOSEPH SACK l 

